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Heart|Natural|GIA

1.31ct F SI1 Heart Natural Diamond

VG • F/SI1 • GIA 2155358278

Certificate GIA 2155358278

Diamond specifications and retailer prices

From £2,368 GBP
As of November 6, 2026
Save £1,938 GBP (45%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £4,306 GBP at Wholesale Diamonds Direct · As of November 6, 2026
View at Wholesale Diamonds Direct

About this 1.31ct natural heart diamond

This 1.31ct natural heart sits in the one-and-a-quarter to one-and-a-half carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 2155358278. Listed at 3 retailers as of November 6, 2026, with prices from £2,368 to £4,306, a £1,938 spread on the same certified stone. Wholesale Diamonds Direct lists it at £4,306. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.31
Carat
F
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishGood
SymmetryGood
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2155358278
Dimensions6.37 × 5.77 × 4.09 mm
L/W Ratio1.10
Culet sizeNone
Top View
6.37 mm5.77 mm1.31 ctF / SI1
OriginNatural
CutVery Good
PolishGood
SymmetryGood
FluorescenceFaint
CertificateGIA 2155358278
Side View
Table 62.0%CrownGirdle: ThinPavilionCulet: NoneDepth 70.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £2,368 GBP|Low: £2,368 GBP|High: £7,838 GBP|Avg: £5,518 GBP|-49.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Wholesale Diamonds Direct
October 10, 2026
Retailer 1£2,368 GBP
Retailer 3£2,447 GBP
Wholesale Diamonds Direct£4,306 GBP
Retailer 8£5,044 GBP
Retailer 9£5,047 GBP
Retailer 7£5,228 GBP
Retailer 6£6,250 GBP
Retailer 2£6,728 GBP
Retailer 5£6,879 GBP
Retailer 10£7,400 GBP
Retailer 4£7,838 GBP

2 data points across 11 retailers

3 retailers£2,368 GBP to £4,306 GBP

B+
Cheapest Retailer
-
£2,368 GBP
Final sale: no returns
B+
Retailer 2
-
£2,447 GBP
View
Most Expensive
C
Wholesale Diamonds Direct
52475930 · Nov 6
£4,306 GBP
$5,764 USD
View
2 more retailers have this diamond
Prices start from £2,368 GBPSave up to £1,938 GBP

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

B+
1.31ct Heart
£2,368 GBP